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dc.contributor.authorGarcía Cela, Esther
dc.contributor.authorMarín Sillué, Sònia
dc.contributor.authorSanchís Almenar, Vicente
dc.contributor.authorCrespo Sempere, Ana
dc.contributor.authorRamos Girona, Antonio J.
dc.description.abstractThe effects of two exposure times per day (6 and 16 h) of UV-A or UV-B radiation, combined with dark and dark plus light incubation periods during 7e21 d on fungal growth and mycotoxins production of Aspergillus species were studied. Aspergillus carbonarius and Aspergillus parasiticus were inoculated on grape and pistachio media under diurnal and nocturnal temperatures choosing light photoperiod according to harvest conditions of these crops in Spain. Ultraviolet irradiation had a significant effect on A. carbonarius and A. parasiticus colony size (diameter, biomass dry weight, and colony density) and mycotoxin accumulation, although intraspecies differences were observed. Inhibition of A. carbonarius fungal growth decreased when exposure time was reduced from 16 h to 6 h, but this was not always true for ochratoxin A (OTA) production. OTA reduction was higher under UV-A than UV-B radiation and the reduction increased along time conversely to the aflatoxins (AFs). Aflatoxin B1 (AFB1) was the main toxin produced by A. parasiticus except in the UV-B light irradiated colonies which showed a higher percentage of AFG than AFB. Morphological changes were observed in colonies grown under UV-B light.
dc.description.sponsorshipThe authors are grateful to the Spanish Government (AGL2010-22182-C04-01) and Comissionat per a Universitats i Recerca del Departament d’Innovació, Universitats i Empresa de la Generalitat de Catalunya (AGAUR). The authors are also grateful to Fernando Rubio and Hector Castan by the laboratory support.
dc.relation.isformatofVersió postprint del document publicat a:
dc.relation.ispartofFungal Biology, 2015, vol. 119, núm. 1, p. 67-78
dc.rights(c) The British Mycological Society, 2014
dc.subjectAspergillus carbonarius
dc.subjectAspergillus parasiticus
dc.subjectClimate change
dc.subjectOchratoxin A
dc.titleEffect of ultraviolet radiation A and B on growth and mycotoxin production by Aspergillus carbonarius and Aspergillus parasiticus in grape and pistachio media

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(c) The British Mycological Society, 2014
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